n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 10 |
3 | 26 |
4 | 80 |
5 | 194 |
6 | 504 |
7 | 1442 |
8 | 3710 |
9 | 9536 |
10 | 26842 |
11 | 69014 |
12 | 178704 |
13 | 496602 |
14 | 1316204 |
15 | 3377206 |
16 | 9242898 |
17 | 24629944 |
18 | 63304540 |
19 | 172497622 |
20 | 462822414 |
21 | 1210912388 |
22 | 3177522724 |
23 | 8736822276 |
24 | 22617998204 |
25 | 59776061150 |
26 | 163702751968 |
27 | 433787373560 |
[1,4,10,26,80,194,504,1442,3710,9536,26842,69014, 178704,496602,1316204,3377206,9242898,24629944, 63304540,172497622,462822414,1210912388, 3177522724,8736822276,22617998204,59776061150, 163702751968,433787373560] |